Boring motor



T. sElFER BORING MOTOR Filed Nov.` 1 1935 July 20, 1937.

, 3 Sheets-Sheet 1 T. SEIFER vBORING 4MOTOR Filed Nov'.

y July zo, 1937.

i/ ik /Z Patented July 20, 1937 v.UNITED -s'riirizs'g .'IIheo Seifer,Ber-lin, Germany Application November 1.1935, serial No.

In Germany September 23.1933

9'Claims. (01.*255-4)` v M used areopened when the tension of 'a springhas increased to a certain extent. According to the present'inventionthe action of the springs of the valves is controlled by abolting device influenced by the parts of the ymotor moving against oneanother. store in the valve spring a quite greater tension than in thewell-known motors'. Therefore the opening of the valve constructedaccording to. V'the invention is accelerated and the number of strokesof the motor per unit of time is increased. Furthermore the motor can bemade to work with uniform and exactly adjustable height of the stroke,whereas the working and the height of the stroke of the usual motors isliable to vary, because lthespring is only compressed by thehydraulicpressure of the streaming ii ushing fluid and the friction in the'moving vparts of the movs iderable variations. p

In the annexed drawings different 'modifications embodying the inventionare illustratedin connectionwith a. motor inv which the chisel issuspended from `the cylinder moving upwards and downwards, the valvecooperating with an annular valve surface in a plane' approximatelyvperpendicular to the axis of the bore tubing."

Y Fig. 1 is a vertical longitudinal cross-section,

partly an elevation of a boring mechanism constructed according to theinvention, vthe valve being closed.` Y

Fig. 2 is a similar view showing the mechanism with the valve opened.A`

Figs. 3 and 5 are perspective views, and Fig, 4 is a horizontalcross-section on the line IV-1'V of Fig. 3, these three figures showinga modiiica section still another modification. The same referenceletters are used to designate corresponding parts throughout all theHereby it is possible to` Fig. 11 is a'detail showingin verticalcrossthrough which' the '.ushins ,uidg fiows, b the' cylinder of thehydraulic 'motorfconnect'edwith the chisel c. d is api's'ton'f-'likefenlargenient of the tubinga, on which thecylinder bniay slide upwardly and downwardly; ths'piston separates the cylinderspace into` two parts. e. is an' open-, 'ing in the ftubi n g a forintroducing `thegilushing j uid into the upper part of the cylinder andf is another .opening in the tubing a for introducing the' flushingiiuid into the lower part of the cylinder.' Between theo'penings e andf'a'valv is providedin the tubi'nga, thevalve body g being secured tothe rod h.- A collar iis provided onv the valve rod h, and a'secondcollar 1c is xed at the free end ofthe rod h. A cylinder 1 havinga l smaller diameter than the cylinderb is coaxially and rigidly`connected with the latter. In its 'interior the cylinderl carries anannular pro-ik jectioni rn, and at 'its exterion upper and lower endgitis provided with collar-like thickenedfportions n. With" the'l werlportionof the tubing Referring firstI to Figs. l and 2, 'aistl 1 e thelevers o are 'pivotally connected cooperatingv by rests p fwith'thecollarni andk sliding with rolls q on' the outer 'surface o f Ithecylinder l.

lr ands are the" control springs of the valve. tor. This friction,howevenis subjected to cont in' Figs. 1.2,5, "7. 8,'9 and, 10 is va,spring keeping the leverso in locking-position. u are,

openings near the bottom ofthe cylinder throughIV y which the flushingtowards the chisel. The motorworks as follows:'

When'the valve is in theclo'sing positionthe iiushing fluid fiowsfromthetubingdthroughk the opening e into the upper space ofI the'c'yl'- inglrcollar km of the cylinder l and, onthe .other hand, against the'collar `i assuming' with the valve rod and thevalvejg an 'idle position,.because the rests p of the levers o are located above the collar iacting as' 'an abutment. .While the thickened portion `11. ofthecylinderl attainsfthe spring t towards .the wall of the'cylinderghreinder b lifting'therebyfthe'fcylinderfwith the chisel andcompressing.the'control'spring 1', the Y 1 "latter bearing,`on the onehand,` against the risleasing the collar ii'sothat the latter 'isprojected v upwards by the spring lfand valve gis opened. Now theushinguid isilllowed'` tojflow' through the openings je, fjf u to the lchiselc vflushing aWaytheQcuttings produced byilthe chisel in ythe foregoingstroke. The cylinder b .with the'` chisel c sinks down by itsown weightand the' Vreus;

q again run onthe thinner portion of the cylinspring t`inwardly,.and therests p of the levers o lock the valve rod h beneath the collar i. The

cylinder including the heavy bar z and the chisel c continues to dropdown compressing the spring s which on the one hand bearsvagainst the.lowering collar m and, on the other hand, against the collar k, thecollar i being retained by the abutments p. As soon as the rolls q riseupon the upper thickened portion of the cylinder Z the levers o areforced toswing outwardly and, the abutments p are lifted beneath thecollar i in the same way as on opening the valve, andthe spring s closesthe valve y. Then the play of the motor begins anew.

'Ihe modifications shown in Figs. 3-11 diier only in the construction ofthe locking means Y o, p and q for the collar i on the valve rod h, theother parts of the motor being only so slightly modied that no specialexplanation of these -parts common to all modifications seems necessary.

vIn

stead of thelevers o, which sleeves are 'equipped `with abutments p androlls q similar to those connected with the levers o in Figs. 1 and?, byfmeans of which the valve is' released in such a Y abutments p arebrought into or out of vengagement with the stop iV on the valve rod h.The springs 1 and sin this Acase'act in the same manner as describedabove'and shown in Figs. 1 and 2.` e l In'the modication shown in Figs.l, 2 and 5, the rolls `Q are held pressed against the guiding This'spring may be req, f. i., by providing not only one roll,'but a pairofv rolls on each sleeve v as shown in Fig.4 so

thatthe one roll runs in a recessV of the cylinder V ,l whilesimultaneously the other roll runsfon the thickenedwportion ofthe`cylinder,`whereas reversely when the 'rst roll attains the thickenedportion oi the cylinder l the other roll of the pair attains the recessof the cylinder l. In this way the rolls qjwork forcibly together withthe cylinder.y l. V f

`In the modicationshown in Fig. 6 the rolls q are likewise forciblyguided, the spring t being avoided and only "a single rollA beingprovided which is guided in this case between the sloping surfaces wprovided on the' inner wall of` the motor cylinder -bl and theY outerwall of the inner cylinder Z. e

Inthe modication shown in Figs. 9 and 10 the swinging leverso of Figs.`1 and2 are'combinedwith the rotatable sleeves of Figs. `3 to 5.

On displacing the cylinder with respect to: the

rstationary tubing theV innermsloping surface of the' levers o willbring rthe levers p (Fig. 10) out of engagement with the collar orKabutment z" thereby releasing the closing spring. jThe V'abut'nients pare here shaped lto' v4form levers swinging around a perpendicular axis,exactly as shown in Figs. 3pto 5.

The modification inustrated in Figli differs Afrom that shown in Fig9only by the levers p2 forming the" rests'syl/inging",` around horizontalinstead of perpendicular axes. It enables a shorter,'more kcompactstructure` than the modi- 'e cation represents byvFigs. 7 'andv8. y i Itis understood that in the springs r or s' any desired excess lof powercan be'stored up kto the thelmodication showin? in Figs.v 3 to 5 sleevesvrotatable on rods o` are provided inder Z the levers o swing under theaction of the trol springs, their length is calculated in suchk a mannerthat they are not wholly released in their end position. for it has beenascertained kthat the duration of the springs is increased by takingcare that they are not wholly released after each stroke or swing beyondthe state of complete release. It is also possible to provide longersprings or normal springs and abutments :c on the rod h (Figs. 7 and 8)which are retained at .the abutment :c by dishes y freely movable on thevalve rod h, the abutment being allowed to slide through the annularprojection 1. In a motor working in a bore-hole by means of aflushingfluid, a tubing, a piston rigidly connected therewith, acylinder adaptedv to. slide m in theinner cylinder Il. y I v carryingthe body lof the valvean abutment on the' said rodglevers pivotallyconnectedwith the jrtubi'ng, rests provided onftthe/ said levers adapted:to engage the said abutment `alternately from both sides, a secondabutment on a moving part of the motor, a spring between bothabutments,

' a disk at the endof the said rod, a' spring between the ydisk and/therstnamed abutment,y

and cams provided on amoving part of the motor cooperating with the saidlevers.l y

2. In a motor working in a .bore-holevby means of aushing fluid, atubing, a piston rigidly connected therewith, a cylinder adapted toslideover the said piston, a chisel suspended from the said cylinder, avalve in thesaid'tubing, springs ar ranged to open 'and to k,close saidvalve under the action of a moving part of themotor, a rod lcarryingthoffbo'dy of the valve, an abutment on the said rod, sleevesyrotatablyconnected with the tubing ,and carrying restsv adapted to engage the'said .abutment alternately from both sides, rolls mounted on ,the saidvsleeves, and a member rigidly connected with the vcylinder and carryingcams cooperating with thesaid rolls. l

3. In a motor working in abore-holeby means of a ushing'fluid, a tubing,a piston rigidly connected therewith, a cylinder adapted to slide overthe said piston, a chisel suspended from the said cylinder, a valve inthesaidftubing, springs arranged to open and to close .said valveunderthe action of a moving part of the motor, a rodcarr'ying the body of thevalve, anabutment on the said rod, sleeves rotatably connected with thetub- "ing and carrying rests adapted to engagethe said l abutmentalternately 1 from both sides,V rolls mounted onthefsaidfsleeves. a.member rigidly connected with the cylinder and carrying cams cooperatingWith'the said rolls and springs tending to keep the said rests and rollsin engagement with the said abutment and cams.

. 4. In afinotor working`"in`a bore-hole by'vmeans of a flushing fluid,a tubing, a. .piston rigidly connected therewith, a cylinder adapted toslideover over the said piston, a chisel suspendedfrom the saidcylinder, a valvefinth'e said tubing, a rod the said piston, av chisely,suspended from the said cylinder, a valve'in the 'salditubing springsarranged to openand to close saidvalve under the action of amoevingpartof lthe'motor, a smaller 75 cylinder concentrically arranged in themotor cylinder and rigidly connected therewith, a sloping shoulder onthe inner wall of the motor cylinder, sloping shoulders on the outerwall of the smaller cylinder, and valve controlling members connectedwith the tubing and cooperating with the said shoulders.

5. In a motor working in a bore-hole by means `of a flushing fluid, atubing, a piston rigidly connected therewith, a cylinder adapted toslide over the said piston, a chisel suspended from the said cylinder, avalve in the said tubing, Vsprings arranged to open and to close saidvalve under the action of a moving part of the motor, a rod carrying thebody of the Valve, an abutment on the said rod, sleeves rotatablyconnected with' the tubing and carrying rests adapted to engage the saidabutment alternately from both sides, pairs of rolls mounted on the saidsleeves, and a member rigidly connected with the cylinder and carryingpairs of cams staggered with respect to one another cooperating with thesaid rolls.

6. A device in accordance with claim '7, in which abutments are providedon which the control spring and the moving part of the motor, contiguousto the spring up to its final position, strikes before the spring iscompletely released.

7. In a hydraulic motor working in a bore-hole by means of a ilushinguid, a hollow tubing, a piston xed on the tubing, a cylinder adapted toslide upwards and downwards on the said piston, a chisel suspended fromthe said cylinder, an outlet opening at the lower end of the tubing, avalve above the said opening adapted to close and open the latter,springs adapted to be compressed by the upward stroke of the cylinderand to open the said valve, and means operated by a movable part of themotor adapted to prevent the said springs from releasing and looseningthe valve and setting the springs free ina predetermined relativeposition of the cylinder an the piston. Y

8. In a hydraulic motor Working in a bore-hole by means of a flushingfluid, a hollow tubinga piston fixed on the tubing, a cylinder adaptedto slide upwards and downwards on the said piston, a chisel suspendedfrom the said cylinder, an

outlet opening at the lower end of the tubing, a

valve above the said opening adapted to close andppen the latter,springs adapted to be compressed by the upward stroke of the cylinderand to open the said valve, a rod carryingthe body of the valve, anabutmentfon the said rod, levers pivotally connected with the tubing,rests provided on the said levers adapted to engage the said abutmentalternately from both sides, and cams provided on a vmoving part ofthemotor cooperating with the said levers.

9. In a hydraulic motor working in a bore-hole by means of a flushinguid, a hollow tubing, a'v

piston xed on the'tubing, a cylinder adapted yto slide upwards anddownwards on the said piston, a chisel suspended from the said cylinder,an outlet opening at the lower end of the tubing, a valve above the saidopening adapted to close and open the latter, springs adapted to becompressed by the upward stroke of the cylinder and to open the saidvalve, a rod carrying the body of the valve, an abutment on the saidrod, levers pivotally connected'with -the tubing, rests provided on thesaid levers adapted to. engage the said abutment alternately from bothsides, a tension spring connecting the said levers, sliding members atthe ends of the said levers, andcams provided on a moving part of themotor cooperating with the said levers. .n

THEO SEIFER.'

